# Homework Help: Tricky integrals

1. Feb 24, 2014

### asdnator

1. The problem statement, all variables and given/known data
Which technique i should use to solve these integrals?

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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2. Feb 24, 2014

### vela

Staff Emeritus
Use the Feynman technique:
1. Write down the problem.
2. Think really hard.
3. Write down the solution.

3. Feb 24, 2014

### vela

Staff Emeritus
For #5, there's an obvious substitution to try.

For the remaining two, look in your notes and book for techniques to try and take a stab at them. You have to show a reasonable attempt before you can get help here.

4. Feb 28, 2014

### asdnator

Is it right?

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5. Feb 28, 2014

### Staff: Mentor

You can check it yourself. Take the derivative of your answer. If it's correct, you should end up with the integrand. This is something you should make a habit of doing.